@article{df1bfc755a20479695be9811c893ba7e,
title = "All-order factorization for Drell-Yan cross sections",
abstract = "We outline all-order perturbative arguments, which show that factorization holds for Drell-Yan cross sections.",
author = "Collins, \{John C.\} and Soper, \{Davison E.\} and George Sterman",
note = "Funding Information: 1. Introduction. Despite their central importance \textbackslash{}[1 \textbackslash{}] in the interpretation of experiment, factorization theorems in QCD have had an uneven history. The original all-order arguments for factorization in e+e - h + X and hard hadron-hadron scattering \textbackslash{}[2\textbackslash{}] met with general, if uncritical, acceptance. However, the justifications given in the original papers are seriously incomplete. This incompleteness of proof is evident from the calculations of ref. \textbackslash{}[3\textbackslash{}]w, hich found infra-red divergences at non-leading twist, and from the recent work in refs. \textbackslash{}[4 6\textbackslash{}]. See also refs. \textbackslash{}[7\textbackslash{}]a nd \textbackslash{}[8\textbackslash{}]. What is missing in ref. \textbackslash{}[2\textbackslash{}] is a proper treatment of the effects of low-momentum partons. (A {"}low-momentum parton{"} we define to be one for which all its momentum components are much smaller than the center-of-mass energy, as viewed in the center-of-mass frame.) Exchanges of low-momentum partons include (at least at a perturbative level) the effects of pomeron exchanges. It was well-known \textbackslash{}[9\textbackslash{}],lo ng before the advent of tile QCD factorization theorems, that pomeron ¢\textasciitilde{} Work supported by the US Department of Energy under con-tracts DE-AT06-76ER-70004 and DE-AC02-80ER-10712 and by the US National Science Foundation under contract PHY-81-09110. 1 On leave from: Institute of Theoretical Science, University of Oregon, Eugene, OR 97403, USA.",
year = "1984",
month = jan,
day = "12",
doi = "10.1016/0370-2693(84)90684-1",
language = "English (US)",
volume = "134",
pages = "263--268",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier B.V.",
number = "3-4",
}